I got one of these boring head kits. Covers 8 - 320mm with the range of boring bars supplied. It doesn't do facing operations like a Wohlhaupter but you'd need to pay a fair bit more for one of those.
If you want a deep 80mm bore, you may want a smaller diameter head that would fit within that bore.
https://www.aliexpress.com/item/4000....4000551597026
